./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_k.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_k.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:39:43,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:39:43,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:39:43,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:39:43,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:39:43,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:39:43,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:39:43,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:39:43,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:39:43,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:39:43,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:39:43,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:39:43,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:39:43,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:39:43,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:39:43,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:39:43,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:39:43,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:39:43,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:39:43,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:39:43,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:39:43,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:39:43,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:39:43,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:39:43,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:39:43,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:39:43,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:39:43,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:39:43,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:39:43,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:39:43,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:39:43,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:39:43,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:39:43,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:39:43,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:39:43,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:39:43,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:39:43,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:39:43,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:39:43,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:39:43,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:39:43,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:39:43,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:39:43,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:39:43,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:39:43,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:39:43,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:39:43,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:39:43,656 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:39:43,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:39:43,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:39:43,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:39:43,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:39:43,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:39:43,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:39:43,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:39:43,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:39:43,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:39:43,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:39:43,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:39:43,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:39:43,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:39:43,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:39:43,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:39:43,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:39:43,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:39:43,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:39:43,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:39:43,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:39:43,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:39:43,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:39:43,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:39:43,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:39:43,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:39:43,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2021-11-07 08:39:44,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:39:44,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:39:44,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:39:44,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:39:44,037 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:39:44,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-new/count_by_k.i [2021-11-07 08:39:44,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/data/2d59d40c3/c278775753224eb3893e55d1218ff007/FLAG34eec484b [2021-11-07 08:39:44,706 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:39:44,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/sv-benchmarks/c/loop-new/count_by_k.i [2021-11-07 08:39:44,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/data/2d59d40c3/c278775753224eb3893e55d1218ff007/FLAG34eec484b [2021-11-07 08:39:45,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/data/2d59d40c3/c278775753224eb3893e55d1218ff007 [2021-11-07 08:39:45,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:39:45,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:39:45,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:39:45,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:39:45,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:39:45,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374f8951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45, skipping insertion in model container [2021-11-07 08:39:45,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:39:45,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:39:45,342 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-11-07 08:39:45,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:39:45,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:39:45,379 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-11-07 08:39:45,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:39:45,399 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:39:45,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45 WrapperNode [2021-11-07 08:39:45,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:39:45,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:39:45,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:39:45,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:39:45,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:39:45,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:39:45,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:39:45,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:39:45,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:39:45,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:39:45,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:39:45,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:39:45,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (1/1) ... [2021-11-07 08:39:45,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:39:45,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:45,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:39:45,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:39:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:39:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:39:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:39:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:39:45,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:39:45,785 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 08:39:45,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:39:45 BoogieIcfgContainer [2021-11-07 08:39:45,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:39:45,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:39:45,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:39:45,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:39:45,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:39:45" (1/3) ... [2021-11-07 08:39:45,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4578f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:39:45, skipping insertion in model container [2021-11-07 08:39:45,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:45" (2/3) ... [2021-11-07 08:39:45,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4578f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:39:45, skipping insertion in model container [2021-11-07 08:39:45,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:39:45" (3/3) ... [2021-11-07 08:39:45,799 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2021-11-07 08:39:45,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:39:45,807 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:39:45,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:39:45,878 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:39:45,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:39:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:39:45,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:45,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:45,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2021-11-07 08:39:45,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:45,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252744605] [2021-11-07 08:39:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:45,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:46,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:46,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252744605] [2021-11-07 08:39:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252744605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:46,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:46,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:39:46,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797314178] [2021-11-07 08:39:46,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:39:46,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:39:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:39:46,135 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:46,153 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-07 08:39:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:39:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 08:39:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:46,166 INFO L225 Difference]: With dead ends: 21 [2021-11-07 08:39:46,166 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 08:39:46,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:39:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 08:39:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 08:39:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 08:39:46,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-11-07 08:39:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:46,224 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 08:39:46,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 08:39:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:39:46,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:46,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:46,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:39:46,227 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2021-11-07 08:39:46,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:46,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147159656] [2021-11-07 08:39:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:46,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:46,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:46,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147159656] [2021-11-07 08:39:46,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147159656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:46,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:46,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:39:46,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535865085] [2021-11-07 08:39:46,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:39:46,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:46,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:39:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:39:46,588 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:46,664 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-07 08:39:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:39:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 08:39:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:46,667 INFO L225 Difference]: With dead ends: 15 [2021-11-07 08:39:46,667 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 08:39:46,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:39:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 08:39:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-07 08:39:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-07 08:39:46,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-11-07 08:39:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:46,673 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-07 08:39:46,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-07 08:39:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:39:46,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:46,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:46,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:39:46,676 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2021-11-07 08:39:46,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:46,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499480218] [2021-11-07 08:39:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:46,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:46,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:46,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499480218] [2021-11-07 08:39:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499480218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:46,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719481971] [2021-11-07 08:39:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:46,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:46,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:46,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:39:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:39:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719481971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:47,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 08:39:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459549395] [2021-11-07 08:39:47,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:39:47,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:39:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:39:47,022 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:47,137 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-07 08:39:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:39:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 08:39:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:47,139 INFO L225 Difference]: With dead ends: 20 [2021-11-07 08:39:47,139 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 08:39:47,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:39:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 08:39:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 08:39:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-07 08:39:47,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-11-07 08:39:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:47,144 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-07 08:39:47,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-07 08:39:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:39:47,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:47,146 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:47,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:47,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:47,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash -530250892, now seen corresponding path program 2 times [2021-11-07 08:39:47,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:47,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374668342] [2021-11-07 08:39:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:47,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:47,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:47,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374668342] [2021-11-07 08:39:47,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374668342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:47,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132986966] [2021-11-07 08:39:47,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:47,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:47,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:47,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:47,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:39:47,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:47,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:39:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132986966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:47,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:47,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 08:39:47,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956855105] [2021-11-07 08:39:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:39:47,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:39:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:39:47,720 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:47,872 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-07 08:39:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:39:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 08:39:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:47,876 INFO L225 Difference]: With dead ends: 26 [2021-11-07 08:39:47,876 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:39:47,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:39:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:39:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 08:39:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-07 08:39:47,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-11-07 08:39:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:47,890 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-07 08:39:47,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-07 08:39:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:39:47,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:47,893 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:47,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:48,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:48,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1251080700, now seen corresponding path program 3 times [2021-11-07 08:39:48,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:48,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969844180] [2021-11-07 08:39:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:48,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:48,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:48,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969844180] [2021-11-07 08:39:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969844180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:48,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473503810] [2021-11-07 08:39:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:39:48,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:48,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:48,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:39:48,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:39:48,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:39:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:48,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473503810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:48,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:48,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-07 08:39:48,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260449989] [2021-11-07 08:39:48,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:39:48,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:39:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:39:48,520 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:48,815 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-07 08:39:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:39:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 08:39:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:48,818 INFO L225 Difference]: With dead ends: 34 [2021-11-07 08:39:48,818 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:39:48,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:39:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:39:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 08:39:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-11-07 08:39:48,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 21 [2021-11-07 08:39:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:48,824 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-11-07 08:39:48,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-11-07 08:39:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:39:48,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:48,826 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:48,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 08:39:49,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:49,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1338239108, now seen corresponding path program 4 times [2021-11-07 08:39:49,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:49,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92514502] [2021-11-07 08:39:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:49,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:49,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:49,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92514502] [2021-11-07 08:39:49,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92514502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888039698] [2021-11-07 08:39:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:39:49,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:49,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:49,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:39:49,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:39:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:39:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:49,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888039698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:49,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:49,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-11-07 08:39:49,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347192976] [2021-11-07 08:39:49,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:39:49,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:39:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:39:49,522 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:49,996 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-11-07 08:39:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:39:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:39:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:49,999 INFO L225 Difference]: With dead ends: 42 [2021-11-07 08:39:49,999 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:39:50,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:39:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:39:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 08:39:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-11-07 08:39:50,006 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 29 [2021-11-07 08:39:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:50,006 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-11-07 08:39:50,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-11-07 08:39:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:39:50,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:50,008 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:50,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:39:50,227 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash -142422260, now seen corresponding path program 5 times [2021-11-07 08:39:50,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:50,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459588488] [2021-11-07 08:39:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:50,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:50,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:50,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459588488] [2021-11-07 08:39:50,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459588488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:50,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31999056] [2021-11-07 08:39:50,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:39:50,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:50,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:50,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:39:50,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-07 08:39:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:39:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31999056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:51,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-11-07 08:39:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457630463] [2021-11-07 08:39:51,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:39:51,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:39:51,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:39:51,097 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:51,957 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-07 08:39:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:39:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 08:39:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:51,961 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:39:51,961 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:39:51,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:39:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:39:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-07 08:39:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-11-07 08:39:51,970 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 37 [2021-11-07 08:39:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-11-07 08:39:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-11-07 08:39:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:39:51,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:51,972 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:51,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:52,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:52,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 6 times [2021-11-07 08:39:52,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:52,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383601581] [2021-11-07 08:39:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:52,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:52,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:52,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383601581] [2021-11-07 08:39:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383601581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:52,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852189] [2021-11-07 08:39:52,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:39:52,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:52,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:52,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:39:52,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-07 08:39:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:39:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:52,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:52,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 27 [2021-11-07 08:39:52,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348481022] [2021-11-07 08:39:52,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:39:52,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:39:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:39:52,931 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:53,874 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-07 08:39:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:39:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 08:39:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:53,875 INFO L225 Difference]: With dead ends: 58 [2021-11-07 08:39:53,875 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:39:53,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:39:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:39:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-07 08:39:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-11-07 08:39:53,885 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 45 [2021-11-07 08:39:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-11-07 08:39:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-11-07 08:39:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:39:53,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:53,888 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:53,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:54,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:54,115 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash 617055260, now seen corresponding path program 7 times [2021-11-07 08:39:54,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:54,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802602772] [2021-11-07 08:39:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:54,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:54,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:54,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802602772] [2021-11-07 08:39:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802602772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:54,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333516511] [2021-11-07 08:39:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:39:54,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:54,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:54,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:39:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:39:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:54,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333516511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:54,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:54,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 31 [2021-11-07 08:39:54,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204435599] [2021-11-07 08:39:54,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:39:54,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:39:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:39:54,996 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:56,219 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-07 08:39:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:39:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 08:39:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:56,220 INFO L225 Difference]: With dead ends: 66 [2021-11-07 08:39:56,221 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:39:56,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=845, Invalid=2347, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:39:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:39:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-07 08:39:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-11-07 08:39:56,231 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 53 [2021-11-07 08:39:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:56,232 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-11-07 08:39:56,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-11-07 08:39:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:39:56,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:56,234 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:56,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 08:39:56,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:39:56,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1856154972, now seen corresponding path program 8 times [2021-11-07 08:39:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:56,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058813715] [2021-11-07 08:39:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:56,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:56,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058813715] [2021-11-07 08:39:56,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058813715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:56,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202721044] [2021-11-07 08:39:56,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:56,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:56,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:56,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:56,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:39:57,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:39:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:57,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202721044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:57,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:57,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 35 [2021-11-07 08:39:57,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895788535] [2021-11-07 08:39:57,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:39:57,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:39:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1115, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:39:57,459 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:59,081 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-07 08:39:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:39:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 08:39:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:59,082 INFO L225 Difference]: With dead ends: 74 [2021-11-07 08:39:59,082 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:39:59,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1093, Invalid=3067, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:39:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:39:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 08:39:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-11-07 08:39:59,093 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 61 [2021-11-07 08:39:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-11-07 08:39:59,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-11-07 08:39:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:39:59,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:59,096 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:59,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:59,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:59,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1855985964, now seen corresponding path program 9 times [2021-11-07 08:39:59,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:59,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652967345] [2021-11-07 08:39:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:59,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:00,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652967345] [2021-11-07 08:40:00,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652967345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640673431] [2021-11-07 08:40:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:40:00,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:00,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:00,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:40:00,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-07 08:40:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:40:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:00,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640673431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:00,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:00,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 39 [2021-11-07 08:40:00,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68792427] [2021-11-07 08:40:00,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:40:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:40:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1399, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:40:00,582 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:02,782 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-07 08:40:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:40:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 08:40:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:02,783 INFO L225 Difference]: With dead ends: 82 [2021-11-07 08:40:02,783 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 08:40:02,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1373, Invalid=3883, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:40:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 08:40:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 08:40:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-11-07 08:40:02,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 69 [2021-11-07 08:40:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:02,794 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-11-07 08:40:02,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-11-07 08:40:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:40:02,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:02,796 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:02,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:03,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:40:03,017 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1676159052, now seen corresponding path program 10 times [2021-11-07 08:40:03,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:03,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723137729] [2021-11-07 08:40:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:03,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:03,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:03,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723137729] [2021-11-07 08:40:03,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723137729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:03,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772569257] [2021-11-07 08:40:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:40:03,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:03,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:03,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:40:03,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:40:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:40:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772569257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:04,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:04,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2021-11-07 08:40:04,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227164934] [2021-11-07 08:40:04,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:40:04,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:40:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:40:04,392 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:07,052 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-11-07 08:40:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:40:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:40:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:07,053 INFO L225 Difference]: With dead ends: 90 [2021-11-07 08:40:07,053 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 08:40:07,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1685, Invalid=4795, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 08:40:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 08:40:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-07 08:40:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-11-07 08:40:07,064 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 77 [2021-11-07 08:40:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-11-07 08:40:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-11-07 08:40:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:40:07,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:07,066 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:07,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:07,287 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 11 times [2021-11-07 08:40:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:07,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874828570] [2021-11-07 08:40:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:07,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:08,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:08,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874828570] [2021-11-07 08:40:08,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874828570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:08,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782557088] [2021-11-07 08:40:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:40:08,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:08,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:08,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:40:08,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-07 08:40:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:40:08,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:09,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782557088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:09,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:09,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 65 [2021-11-07 08:40:09,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669218832] [2021-11-07 08:40:09,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 08:40:09,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 08:40:09,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:40:09,768 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:14,858 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-11-07 08:40:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:40:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 08:40:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:14,860 INFO L225 Difference]: With dead ends: 98 [2021-11-07 08:40:14,860 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 08:40:14,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2860, Invalid=8482, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 08:40:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 08:40:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-07 08:40:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-11-07 08:40:14,870 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 85 [2021-11-07 08:40:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:14,871 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-11-07 08:40:14,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-11-07 08:40:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:40:14,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:14,873 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:14,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:40:15,091 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1036401860, now seen corresponding path program 12 times [2021-11-07 08:40:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:15,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892894233] [2021-11-07 08:40:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:15,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:16,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:16,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892894233] [2021-11-07 08:40:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892894233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:16,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002974461] [2021-11-07 08:40:16,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:40:16,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:16,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:16,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:40:16,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-11-07 08:40:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:40:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002974461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:17,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:17,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 51 [2021-11-07 08:40:17,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618514995] [2021-11-07 08:40:17,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 08:40:17,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 08:40:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2443, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:40:17,187 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:20,890 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2021-11-07 08:40:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 08:40:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:40:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:20,892 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:40:20,892 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 08:40:20,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2405, Invalid=6907, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:40:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 08:40:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-07 08:40:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-11-07 08:40:20,904 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 93 [2021-11-07 08:40:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:20,904 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-11-07 08:40:20,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-11-07 08:40:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:40:20,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:20,907 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:20,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:21,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:40:21,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1225581388, now seen corresponding path program 13 times [2021-11-07 08:40:21,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:21,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153777636] [2021-11-07 08:40:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:21,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:22,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:22,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153777636] [2021-11-07 08:40:22,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153777636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:22,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179240736] [2021-11-07 08:40:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:40:22,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:22,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:22,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:22,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:40:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:22,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 08:40:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179240736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:23,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:23,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 55 [2021-11-07 08:40:23,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751448972] [2021-11-07 08:40:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 08:40:23,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 08:40:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2855, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:40:23,199 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:27,733 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-11-07 08:40:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:40:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:40:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:27,735 INFO L225 Difference]: With dead ends: 114 [2021-11-07 08:40:27,735 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:40:27,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2813, Invalid=8107, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:40:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:40:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-07 08:40:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2021-11-07 08:40:27,743 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 101 [2021-11-07 08:40:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:27,744 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2021-11-07 08:40:27,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2021-11-07 08:40:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:40:27,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:27,746 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:27,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:27,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:40:27,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash -760708652, now seen corresponding path program 14 times [2021-11-07 08:40:27,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:27,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665314454] [2021-11-07 08:40:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:27,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:29,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:29,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665314454] [2021-11-07 08:40:29,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665314454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:29,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362365224] [2021-11-07 08:40:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:40:29,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:29,323 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:40:29,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:40:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:40:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:30,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362365224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:30,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 59 [2021-11-07 08:40:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721472662] [2021-11-07 08:40:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 08:40:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 08:40:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3299, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:40:30,304 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:35,667 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2021-11-07 08:40:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 08:40:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-07 08:40:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:35,680 INFO L225 Difference]: With dead ends: 122 [2021-11-07 08:40:35,680 INFO L226 Difference]: Without dead ends: 118 [2021-11-07 08:40:35,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3253, Invalid=9403, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 08:40:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-07 08:40:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-07 08:40:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-11-07 08:40:35,689 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 109 [2021-11-07 08:40:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:35,690 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-11-07 08:40:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-11-07 08:40:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:40:35,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:35,691 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:35,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:35,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:40:35,919 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1843324836, now seen corresponding path program 15 times [2021-11-07 08:40:35,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:35,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604938429] [2021-11-07 08:40:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:35,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:37,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604938429] [2021-11-07 08:40:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604938429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873976573] [2021-11-07 08:40:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:40:37,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:37,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:37,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:40:37,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2021-11-07 08:40:37,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 08:40:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873976573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:38,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:38,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 63 [2021-11-07 08:40:38,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204829908] [2021-11-07 08:40:38,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 08:40:38,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 08:40:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=3775, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:40:38,297 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:44,654 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-11-07 08:40:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:40:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 08:40:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:44,656 INFO L225 Difference]: With dead ends: 130 [2021-11-07 08:40:44,656 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 08:40:44,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3725, Invalid=10795, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 08:40:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 08:40:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-07 08:40:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2021-11-07 08:40:44,664 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 117 [2021-11-07 08:40:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2021-11-07 08:40:44,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2021-11-07 08:40:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 08:40:44,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:44,666 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:44,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:44,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:40:44,887 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash 922658532, now seen corresponding path program 16 times [2021-11-07 08:40:44,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:44,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671534364] [2021-11-07 08:40:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:44,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:46,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671534364] [2021-11-07 08:40:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671534364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463983012] [2021-11-07 08:40:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:40:46,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:46,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:46,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:46,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:40:47,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:40:47,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 08:40:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463983012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:47,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:47,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 67 [2021-11-07 08:40:47,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714064124] [2021-11-07 08:40:47,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:40:47,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:40:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4283, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:40:47,885 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:55,706 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2021-11-07 08:40:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 08:40:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-07 08:40:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:55,707 INFO L225 Difference]: With dead ends: 138 [2021-11-07 08:40:55,707 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 08:40:55,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4229, Invalid=12283, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 08:40:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 08:40:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-07 08:40:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2021-11-07 08:40:55,712 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 125 [2021-11-07 08:40:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:55,712 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2021-11-07 08:40:55,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:40:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2021-11-07 08:40:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 08:40:55,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:55,714 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:55,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:55,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:40:55,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1758014828, now seen corresponding path program 17 times [2021-11-07 08:40:55,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:55,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917809946] [2021-11-07 08:40:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:55,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:57,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:57,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917809946] [2021-11-07 08:40:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917809946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:57,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840757954] [2021-11-07 08:40:57,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:40:57,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:57,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:57,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:40:58,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2021-11-07 08:40:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 08:40:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:01,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840757954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:01,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:01,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 101 [2021-11-07 08:41:01,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394926285] [2021-11-07 08:41:01,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 08:41:01,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:01,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 08:41:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=9305, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 08:41:01,317 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:18,589 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-11-07 08:41:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 08:41:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 08:41:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:18,590 INFO L225 Difference]: With dead ends: 146 [2021-11-07 08:41:18,591 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 08:41:18,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=6868, Invalid=20854, Unknown=0, NotChecked=0, Total=27722 [2021-11-07 08:41:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 08:41:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-07 08:41:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2021-11-07 08:41:18,600 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 133 [2021-11-07 08:41:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:18,601 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2021-11-07 08:41:18,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2021-11-07 08:41:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 08:41:18,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:18,602 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:18,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:18,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:18,803 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -955733004, now seen corresponding path program 18 times [2021-11-07 08:41:18,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:18,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952320926] [2021-11-07 08:41:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:18,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:21,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:21,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952320926] [2021-11-07 08:41:21,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952320926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:21,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457124057] [2021-11-07 08:41:21,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:41:21,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:21,098 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:21,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:41:21,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2021-11-07 08:41:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 08:41:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:22,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457124057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:22,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:22,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 75 [2021-11-07 08:41:22,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585934070] [2021-11-07 08:41:22,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 08:41:22,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 08:41:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=5395, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:41:22,300 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:32,802 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2021-11-07 08:41:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 08:41:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 08:41:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:32,804 INFO L225 Difference]: With dead ends: 154 [2021-11-07 08:41:32,804 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 08:41:32,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5333, Invalid=15547, Unknown=0, NotChecked=0, Total=20880 [2021-11-07 08:41:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 08:41:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-07 08:41:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2021-11-07 08:41:32,814 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 141 [2021-11-07 08:41:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:32,814 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2021-11-07 08:41:32,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2021-11-07 08:41:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 08:41:32,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:32,816 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:32,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:33,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:33,031 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -381345156, now seen corresponding path program 19 times [2021-11-07 08:41:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:33,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771815662] [2021-11-07 08:41:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:33,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:35,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:35,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771815662] [2021-11-07 08:41:35,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771815662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:35,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130839773] [2021-11-07 08:41:35,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:41:35,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:35,419 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:35,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:41:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 08:41:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:37,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130839773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:37,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:37,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 79 [2021-11-07 08:41:37,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346751384] [2021-11-07 08:41:37,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 08:41:37,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 08:41:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=5999, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:41:37,020 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:49,378 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2021-11-07 08:41:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 08:41:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 08:41:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:49,380 INFO L225 Difference]: With dead ends: 162 [2021-11-07 08:41:49,380 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 08:41:49,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=5933, Invalid=17323, Unknown=0, NotChecked=0, Total=23256 [2021-11-07 08:41:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 08:41:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-07 08:41:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2021-11-07 08:41:49,387 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 149 [2021-11-07 08:41:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:49,387 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2021-11-07 08:41:49,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2021-11-07 08:41:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 08:41:49,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:49,388 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:49,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:49,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 08:41:49,589 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1594265860, now seen corresponding path program 20 times [2021-11-07 08:41:49,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:49,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136401256] [2021-11-07 08:41:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:49,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:52,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:52,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136401256] [2021-11-07 08:41:52,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136401256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:52,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821826622] [2021-11-07 08:41:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:41:52,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:52,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:41:53,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:41:53,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:53,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 08:41:53,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:54,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821826622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:54,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:54,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 83 [2021-11-07 08:41:54,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37127230] [2021-11-07 08:41:54,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 08:41:54,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 08:41:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=6635, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 08:41:54,056 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:07,954 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2021-11-07 08:42:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 08:42:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-07 08:42:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:07,956 INFO L225 Difference]: With dead ends: 170 [2021-11-07 08:42:07,956 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:42:07,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=6565, Invalid=19195, Unknown=0, NotChecked=0, Total=25760 [2021-11-07 08:42:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:42:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-11-07 08:42:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-11-07 08:42:07,964 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 157 [2021-11-07 08:42:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:07,965 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-11-07 08:42:07,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-11-07 08:42:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 08:42:07,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:07,966 INFO L513 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:07,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-07 08:42:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:08,182 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1344997492, now seen corresponding path program 21 times [2021-11-07 08:42:08,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:08,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697898883] [2021-11-07 08:42:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697898883] [2021-11-07 08:42:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697898883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064954644] [2021-11-07 08:42:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:42:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:11,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:11,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:42:11,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2021-11-07 08:42:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 08:42:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:12,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064954644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:12,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:12,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 87 [2021-11-07 08:42:12,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901906419] [2021-11-07 08:42:12,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 08:42:12,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 08:42:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=7303, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 08:42:12,586 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:28,436 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2021-11-07 08:42:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 08:42:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-07 08:42:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:28,438 INFO L225 Difference]: With dead ends: 178 [2021-11-07 08:42:28,438 INFO L226 Difference]: Without dead ends: 174 [2021-11-07 08:42:28,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=7229, Invalid=21163, Unknown=0, NotChecked=0, Total=28392 [2021-11-07 08:42:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-07 08:42:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-07 08:42:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2021-11-07 08:42:28,449 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 165 [2021-11-07 08:42:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:28,449 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2021-11-07 08:42:28,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2021-11-07 08:42:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 08:42:28,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:28,451 INFO L513 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:28,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:28,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:42:28,663 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1530418708, now seen corresponding path program 22 times [2021-11-07 08:42:28,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:28,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093967927] [2021-11-07 08:42:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:28,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:31,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:31,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093967927] [2021-11-07 08:42:31,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093967927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:31,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016543721] [2021-11-07 08:42:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:42:31,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:31,959 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:31,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:42:32,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:42:32,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:32,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-07 08:42:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:33,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016543721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:33,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:33,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 91 [2021-11-07 08:42:33,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286602847] [2021-11-07 08:42:33,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 08:42:33,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 08:42:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8003, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 08:42:33,718 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:51,891 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2021-11-07 08:42:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 08:42:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-07 08:42:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:51,894 INFO L225 Difference]: With dead ends: 186 [2021-11-07 08:42:51,894 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 08:42:51,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=7925, Invalid=23227, Unknown=0, NotChecked=0, Total=31152 [2021-11-07 08:42:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 08:42:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-07 08:42:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2021-11-07 08:42:51,903 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 173 [2021-11-07 08:42:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:51,903 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2021-11-07 08:42:51,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2021-11-07 08:42:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 08:42:51,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:51,905 INFO L513 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:52,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:42:52,127 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -658985828, now seen corresponding path program 23 times [2021-11-07 08:42:52,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:52,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573426341] [2021-11-07 08:42:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:52,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:42:55,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:55,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573426341] [2021-11-07 08:42:55,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573426341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:55,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841273734] [2021-11-07 08:42:55,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:42:55,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:55,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:55,519 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:55,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:42:56,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2021-11-07 08:42:56,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 08:42:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:43:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:43:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841273734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:01,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:43:01,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 137 [2021-11-07 08:43:01,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074955313] [2021-11-07 08:43:01,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-07 08:43:01,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:01,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-07 08:43:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=17279, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 08:43:01,105 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 137 states, 137 states have (on average 1.9927007299270072) internal successors, (273), 137 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:43:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:43:41,685 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2021-11-07 08:43:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 08:43:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.9927007299270072) internal successors, (273), 137 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-07 08:43:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:43:41,687 INFO L225 Difference]: With dead ends: 194 [2021-11-07 08:43:41,687 INFO L226 Difference]: Without dead ends: 190 [2021-11-07 08:43:41,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6291 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=12604, Invalid=38698, Unknown=0, NotChecked=0, Total=51302 [2021-11-07 08:43:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-07 08:43:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-07 08:43:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:43:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2021-11-07 08:43:41,698 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 181 [2021-11-07 08:43:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:43:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2021-11-07 08:43:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.9927007299270072) internal successors, (273), 137 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:43:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2021-11-07 08:43:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 08:43:41,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:43:41,701 INFO L513 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:43:41,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 08:43:41,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:41,919 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:43:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:43:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1747059932, now seen corresponding path program 24 times [2021-11-07 08:43:41,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:43:41,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224217906] [2021-11-07 08:43:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:41,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:43:45,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224217906] [2021-11-07 08:43:45,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224217906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:45,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17721648] [2021-11-07 08:43:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:43:45,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:43:45,450 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:43:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:43:46,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2021-11-07 08:43:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:43:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 08:43:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:43:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:43:47,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17721648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:47,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:43:47,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 99 [2021-11-07 08:43:47,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605493499] [2021-11-07 08:43:47,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 08:43:47,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:43:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 08:43:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=9499, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:43:47,121 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:08,989 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2021-11-07 08:44:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 08:44:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-07 08:44:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:08,991 INFO L225 Difference]: With dead ends: 202 [2021-11-07 08:44:08,991 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 08:44:08,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4561 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=9413, Invalid=27643, Unknown=0, NotChecked=0, Total=37056 [2021-11-07 08:44:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 08:44:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-07 08:44:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2021-11-07 08:44:09,001 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 189 [2021-11-07 08:44:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:09,002 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2021-11-07 08:44:09,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2021-11-07 08:44:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 08:44:09,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:09,004 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:09,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:09,223 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 3162540, now seen corresponding path program 25 times [2021-11-07 08:44:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:09,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980982768] [2021-11-07 08:44:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:09,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:13,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:13,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980982768] [2021-11-07 08:44:13,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980982768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:13,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643877861] [2021-11-07 08:44:13,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:44:13,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:13,169 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:13,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:44:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 08:44:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643877861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:15,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:44:15,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 103 [2021-11-07 08:44:15,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271313918] [2021-11-07 08:44:15,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 08:44:15,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 08:44:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=10295, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 08:44:15,744 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:40,658 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-11-07 08:44:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 08:44:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-07 08:44:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:40,660 INFO L225 Difference]: With dead ends: 210 [2021-11-07 08:44:40,660 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 08:44:40,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=10205, Invalid=29995, Unknown=0, NotChecked=0, Total=40200 [2021-11-07 08:44:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 08:44:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-07 08:44:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0048780487804878) internal successors, (206), 205 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2021-11-07 08:44:40,673 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 197 [2021-11-07 08:44:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:40,673 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2021-11-07 08:44:40,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2021-11-07 08:44:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-07 08:44:40,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:40,675 INFO L513 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:40,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-07 08:44:40,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:44:40,891 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:40,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1899462708, now seen corresponding path program 26 times [2021-11-07 08:44:40,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:40,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50702528] [2021-11-07 08:44:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:40,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:45,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50702528] [2021-11-07 08:44:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50702528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459938944] [2021-11-07 08:44:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:44:45,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:45,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:45,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:44:46,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:44:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 08:44:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:44:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459938944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:48,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:44:48,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 107 [2021-11-07 08:44:48,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954261748] [2021-11-07 08:44:48,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 08:44:48,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 08:44:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11123, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 08:44:48,169 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:45:15,474 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2021-11-07 08:45:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 08:45:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-07 08:45:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:45:15,476 INFO L225 Difference]: With dead ends: 218 [2021-11-07 08:45:15,476 INFO L226 Difference]: Without dead ends: 214 [2021-11-07 08:45:15,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5357 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=11029, Invalid=32443, Unknown=0, NotChecked=0, Total=43472 [2021-11-07 08:45:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-07 08:45:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-11-07 08:45:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0046948356807512) internal successors, (214), 213 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2021-11-07 08:45:15,489 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 205 [2021-11-07 08:45:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:45:15,489 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2021-11-07 08:45:15,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2021-11-07 08:45:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 08:45:15,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:45:15,491 INFO L513 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:45:15,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:45:15,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:45:15,703 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:45:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:45:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1115403964, now seen corresponding path program 27 times [2021-11-07 08:45:15,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:45:15,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915175111] [2021-11-07 08:45:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:45:15,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:45:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:45:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:45:20,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:45:20,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915175111] [2021-11-07 08:45:20,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915175111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:45:20,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172485203] [2021-11-07 08:45:20,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:45:20,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:45:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:45:20,174 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:45:20,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:45:21,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 104 check-sat command(s) [2021-11-07 08:45:21,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:45:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 08:45:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:45:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:45:22,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172485203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:45:22,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:45:22,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 111 [2021-11-07 08:45:22,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515475296] [2021-11-07 08:45:22,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 08:45:22,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:45:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 08:45:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=11983, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 08:45:22,200 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:45:52,539 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2021-11-07 08:45:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 08:45:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-07 08:45:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:45:52,541 INFO L225 Difference]: With dead ends: 226 [2021-11-07 08:45:52,541 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 08:45:52,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5779 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=11885, Invalid=34987, Unknown=0, NotChecked=0, Total=46872 [2021-11-07 08:45:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 08:45:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-07 08:45:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.004524886877828) internal successors, (222), 221 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2021-11-07 08:45:52,556 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 213 [2021-11-07 08:45:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:45:52,557 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2021-11-07 08:45:52,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:45:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2021-11-07 08:45:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 08:45:52,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:45:52,559 INFO L513 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:45:52,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:45:52,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:45:52,783 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:45:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:45:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1014700732, now seen corresponding path program 28 times [2021-11-07 08:45:52,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:45:52,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13080849] [2021-11-07 08:45:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:45:52,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:45:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:45:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:45:57,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:45:57,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13080849] [2021-11-07 08:45:57,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13080849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:45:57,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822957846] [2021-11-07 08:45:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:45:57,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:45:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:45:57,559 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:45:57,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:45:59,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:45:59,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:46:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 08:46:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:46:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:46:01,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822957846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:46:01,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:46:01,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 115 [2021-11-07 08:46:01,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422314516] [2021-11-07 08:46:01,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 08:46:01,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:46:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 08:46:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=12875, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 08:46:01,020 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:46:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:46:34,307 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2021-11-07 08:46:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 08:46:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-11-07 08:46:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:46:34,309 INFO L225 Difference]: With dead ends: 234 [2021-11-07 08:46:34,309 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 08:46:34,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=12773, Invalid=37627, Unknown=0, NotChecked=0, Total=50400 [2021-11-07 08:46:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 08:46:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-07 08:46:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0043668122270741) internal successors, (230), 229 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:46:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2021-11-07 08:46:34,323 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 221 [2021-11-07 08:46:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:46:34,323 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2021-11-07 08:46:34,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:46:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2021-11-07 08:46:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-07 08:46:34,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:46:34,325 INFO L513 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:46:34,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:46:34,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:46:34,540 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:46:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:46:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1004211148, now seen corresponding path program 29 times [2021-11-07 08:46:34,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:46:34,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871230055] [2021-11-07 08:46:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:46:34,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:46:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:46:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:46:39,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:46:39,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871230055] [2021-11-07 08:46:39,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871230055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:46:39,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616434423] [2021-11-07 08:46:39,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:46:39,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:46:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:46:39,773 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:46:39,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:46:40,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2021-11-07 08:46:40,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:46:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 08:46:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:46:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:46:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616434423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:46:48,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:46:48,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 173 [2021-11-07 08:46:48,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927135575] [2021-11-07 08:46:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-11-07 08:46:48,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:46:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-11-07 08:46:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2055, Invalid=27701, Unknown=0, NotChecked=0, Total=29756 [2021-11-07 08:46:48,014 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand has 173 states, 173 states have (on average 1.9942196531791907) internal successors, (345), 173 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:48:02,815 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2021-11-07 08:48:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-07 08:48:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.9942196531791907) internal successors, (345), 173 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-07 08:48:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:48:02,817 INFO L225 Difference]: With dead ends: 242 [2021-11-07 08:48:02,817 INFO L226 Difference]: Without dead ends: 238 [2021-11-07 08:48:02,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=20068, Invalid=62014, Unknown=0, NotChecked=0, Total=82082 [2021-11-07 08:48:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-07 08:48:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-07 08:48:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0042194092827004) internal successors, (238), 237 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2021-11-07 08:48:02,836 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 229 [2021-11-07 08:48:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:48:02,837 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2021-11-07 08:48:02,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.9942196531791907) internal successors, (345), 173 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2021-11-07 08:48:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-07 08:48:02,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:48:02,839 INFO L513 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:48:02,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 08:48:03,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 08:48:03,055 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:48:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:48:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash -351917484, now seen corresponding path program 30 times [2021-11-07 08:48:03,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:48:03,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093800339] [2021-11-07 08:48:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:48:03,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:48:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:48:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:48:08,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:48:08,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093800339] [2021-11-07 08:48:08,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093800339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:48:08,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726461584] [2021-11-07 08:48:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:48:08,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:48:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:48:08,622 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:48:08,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:48:09,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 116 check-sat command(s) [2021-11-07 08:48:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:48:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 08:48:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:48:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:48:11,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726461584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:48:11,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:48:11,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 123 [2021-11-07 08:48:11,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138593095] [2021-11-07 08:48:11,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 08:48:11,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:48:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 08:48:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=14755, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 08:48:11,033 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:48:54,323 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2021-11-07 08:48:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-07 08:48:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-07 08:48:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:48:54,325 INFO L225 Difference]: With dead ends: 250 [2021-11-07 08:48:54,325 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 08:48:54,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7141 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=14645, Invalid=43195, Unknown=0, NotChecked=0, Total=57840 [2021-11-07 08:48:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 08:48:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-11-07 08:48:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0040816326530613) internal successors, (246), 245 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2021-11-07 08:48:54,340 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 237 [2021-11-07 08:48:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:48:54,340 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2021-11-07 08:48:54,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:48:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2021-11-07 08:48:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 08:48:54,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:48:54,342 INFO L513 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:48:54,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:48:54,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:48:54,555 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:48:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:48:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 143540444, now seen corresponding path program 31 times [2021-11-07 08:48:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:48:54,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106082508] [2021-11-07 08:48:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:48:54,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:48:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:49:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:49:00,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:49:00,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106082508] [2021-11-07 08:49:00,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106082508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:49:00,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114373427] [2021-11-07 08:49:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:49:00,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:49:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:49:00,409 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:49:00,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:49:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:49:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-07 08:49:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:49:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:49:04,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114373427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:49:04,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:49:04,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 127 [2021-11-07 08:49:04,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961461451] [2021-11-07 08:49:04,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 08:49:04,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:49:04,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 08:49:04,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=15743, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:49:04,761 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:49:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:49:50,466 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-11-07 08:49:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-07 08:49:50,466 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-07 08:49:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:49:50,467 INFO L225 Difference]: With dead ends: 258 [2021-11-07 08:49:50,468 INFO L226 Difference]: Without dead ends: 254 [2021-11-07 08:49:50,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=15629, Invalid=46123, Unknown=0, NotChecked=0, Total=61752 [2021-11-07 08:49:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-07 08:49:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-07 08:49:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0039525691699605) internal successors, (254), 253 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:49:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2021-11-07 08:49:50,484 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 245 [2021-11-07 08:49:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:49:50,484 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2021-11-07 08:49:50,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:49:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2021-11-07 08:49:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 08:49:50,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:49:50,486 INFO L513 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:49:50,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:49:50,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:49:50,699 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:49:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:49:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1006940316, now seen corresponding path program 32 times [2021-11-07 08:49:50,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:49:50,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684219518] [2021-11-07 08:49:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:49:50,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:49:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:49:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:49:56,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:49:56,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684219518] [2021-11-07 08:49:56,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684219518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:49:56,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737553289] [2021-11-07 08:49:56,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:49:56,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:49:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:49:56,961 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:49:56,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:49:59,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:49:59,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:50:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 08:50:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:50:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:50:01,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737553289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:50:01,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:50:01,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 131 [2021-11-07 08:50:01,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700857953] [2021-11-07 08:50:01,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 08:50:01,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:50:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 08:50:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=16763, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 08:50:01,538 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:50:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:50:52,250 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2021-11-07 08:50:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-07 08:50:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-07 08:50:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:50:52,253 INFO L225 Difference]: With dead ends: 266 [2021-11-07 08:50:52,253 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 08:50:52,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8129 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=16645, Invalid=49147, Unknown=0, NotChecked=0, Total=65792 [2021-11-07 08:50:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 08:50:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-11-07 08:50:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.003831417624521) internal successors, (262), 261 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:50:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2021-11-07 08:50:52,270 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 253 [2021-11-07 08:50:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:50:52,270 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2021-11-07 08:50:52,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:50:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2021-11-07 08:50:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-07 08:50:52,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:50:52,273 INFO L513 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:50:52,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:50:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:50:52,487 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:50:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:50:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1154831852, now seen corresponding path program 33 times [2021-11-07 08:50:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:50:52,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780762434] [2021-11-07 08:50:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:50:52,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:50:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:50:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:50:59,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:50:59,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780762434] [2021-11-07 08:50:59,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780762434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:50:59,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347912323] [2021-11-07 08:50:59,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:50:59,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:50:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:50:59,380 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:50:59,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1214c3-a470-451f-a2ca-b74e3054192f/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:51:00,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 128 check-sat command(s) [2021-11-07 08:51:00,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:51:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-07 08:51:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:51:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:51:02,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347912323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:51:02,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:51:02,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 135 [2021-11-07 08:51:02,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901856278] [2021-11-07 08:51:02,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-07 08:51:02,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:51:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-07 08:51:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=17815, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 08:51:02,086 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)